Abstract: A torque control mechanism for wrenches and the like in which a pivot block has one end rockably engaging a force tranmsission member, an axially movable plunger has one end rockably opposing a second end of the pivot block, a ball screw carried by the plunger has a control ball element engaging the second end of the pivot block, a balance cam carried by the plunger provides seat for a coiled compression spring having its opposite end engaged by an antifriction device permitting the spring to turn for adjustment purposes, a rotatably adjustable transfer screw engages the antifriction device and is threaded through a stop adjusting nut mounted in the distal end portion of tubular housing for the mechanism.

Abstract: A hand tool, having at least one handle which will provide a tactile response at a predetermined adjustable torque value is provided. The handle includes first and second sections telescopingly and pivotally interconnected. Detent means, including a roller journalled on one section and an axial bore in the other section in which the roller normally resides is provided. The roller and other section are translationally movable with respect to each other. The roller is configured in the form of a segment of a sphere and biased into the end of the bore. The other section also includes means to allow but limit pivotal movement of the roller out of the bore such that it will provide a tactile response at a given torque level and return into the bore when torque is released.

Abstract: A torque wrench comprises an elongate outer housing, an elongate inner part extending in and beyond the outer housing and pivotally connected thereto proximate an end in common of the torque wrench, the extending portion of the inner part providing a handle for the wrench at the end thereof opposite the end in common, the outer housing being adapted to hold a tool at the end in common preferably free of the inner part, and a spring-loaded toggle lever mechanism acting between the handle portion of the inner part and the outer housing and arranged to release when a predetermined torque, that is transmitted to the tool through the handle portion, the toggle lever mechanism, and the outer housing, is exceeded, thereby causing pivotal movement between the outer housing and the inner part.

Abstract: An insert is disclosed for a tool having a handle extending from a first end adjacent to a free second end. The handle has a hollow bore extending therethrough with an axis of the bore generally aligned with an axis of the handle. The insert includes a body having a longitudinal axis and sized to be inserted within the bore at the free end and moved through the bore to an inserted position adjacent the first end. The longitudinal axis is disposed parallel to the bore axis when the body is in the inserted position. An anchor is provided for fixing the body in the inserted position. The body in the inserted position presents a first surface opposing the bore axis. The first surface is provided with female threads selected to threadedly engage male threads on an end of an extension pole sized to be received within the bore.

Abstract: A torque wrench including a shank, a ratchet arm, a torque assembly, a fixed handle, and an axially stable dial. The shank has a flattened portion and a cylindrical portion, both of which are hollow. The ratchet arm pivotably fits in the flattened portion of the shank and the torque assembly fits in the cylindrical portion of the shank. One end of the ratchet arm has a butt with a shank pin fixed on the end of it for contacting with a roller of the torque assembly. The force applied by the roller to the shank pin in proportional to the amount a dial is rotated by a user.

Abstract: An adjustable, click-type, torque wrench comprising an elongate tubular arm with front and rear ends, a work engaging head on an axis normal to the axis of the arm, an elongate lever projecting rearward from the head and freely into the arm, a first pivot pin pivotally connecting the front end portions of the lever and the arm together on an axis parallel with the axis of the head, an elongate link with front and rear ends within the arm, a second pivot pin connecting the front end of the link to the rear end of the lever on an axis parallel with the first pivot pin, an elongate fulcrum block slidably engaged in the arm and freely engaged about the link, a fulcrum pin engaged through the block and the link on an axis parallel with the pivot pins to provide for pivotal movement of the link relative to the block, a plunger in the arm rearward from the link, a cam block with flat faces normally in flat engagement with flat opposing cam seats on the link and the plunger; and a spring yieldingly urging the plunger

Abstract: Improved, manually-operable, adjusting mechanisms for click-type, adjustable torque wrenches which include manually-engageable, resilient, plastic, tubular handgrips slidably engaged about the rear end portions of elongate, tubular, metal wrench lever arms and which are shiftable longitudinally from normal, forward positions in rotary-driving engagement with the arms to actuated rear positions out of rotary-driving engagement with the arm. The invention resides in an improved locking mechanism releaseably locking the grip in rotary-driving engagement with the arm when in its normal position and yieldingly permitting rotation of the grip relative to the arm when turning forces between the arm and grip exceed the shear strength of the material of which the grip is made.

Abstract: A torque wrench, basically exemplified by a torque beam having a driver at one end, a grip at its other end and apparatus associated with said driver and beam providing an observable read-out of any torque that may be developed during use of the wrench, particularly distinguished by a system for defining a prescribed torque limit in use thereof having means associated therewith for producing a highly distinctive alarm signal the nature of which is such to produce an instantaneous torque limiting response of the user at precisely that time the level of the torque applied to said beam reaches said prescribed limit. In a preferred embodiment the system for producing said signal is located in connection with a housing which is releasably based on and secured to said beam immediately of its grip, the means through which the signal is triggered is functionally related to a portion of said read-out apparatus and the alarm signal is preferably provided by a source of light and optionally by a source of sound.

Abstract: An improved adjustable torque wrench that includes a slidably interconnected load screw and adjusting screw positioned within a telescoping lever arm and handle, and also includes a slidable and rotatable adjustment connection between the load and adjusting screws and the handle and lever arm which permits adjusting of the torque setting by a push-pull action of the handle relative to the lever arm.

Abstract: Device for tightening a screw fastening or the like. The device includes a tubular housing with a head piece for joining with the screw fastening, and a handle for gripping the housing and applying torque thereto. Inside the tubular housing there is a device for adjusting and signaling the torque, as well as a device for measuring the angle of rotation in tightening the screw fastening. The torque device is connected to the angle-of-rotation device in such a way that the angle-of-rotation device is triggered when a certain jointing torque is achieved.

Abstract: An adjustable click-type torque wrench comprising an elongate, tubular arm with front and rear ends, a work-engaging head on an axis normal to the axis of the arm, an elongate link projecting rearwardly from the head and freely into the arm, a first pivot means connecting the front end portion of the lever to the front end portion of the arm on an axis parallel with the axis of the head, an elongate link with front and rear ends within the arm, a second pivot means connecting the front end of the link to the rear end of the lever on an axis parallel with the first pivot means, an elongate annular fulcrum block engaged about the link between the ends thereof and shiftable circumferentially and longitudinally relative thereto and having an annular outwardly disposed bearing surface with diametrically opposite work load transmitting sides engaging diametrically opposite sides of the interior surface of the arm on a central radial plane of the link which is normal to the axis of said pins, the central axis of the

Abstract: A torque wrench comprising an elongate, straight tubular lever with open front and rear ends, a work-engaging head at the front end of the lever and having a lever arm projecting into and pivotally connected with the front end portion of the lever, an elongate crank projecting freely rearwardly into the lever, an elongate axially biased compression spring extending longitudinally in the lever rearward of the crank, cam means between the spring and the crank normally releasably holding the crank concentric in the lever and operating to allow the crank to pivot and strike a side of the lever when a predetermined set operating force is exerted between the head and the lever through and about the axis of the lever arm. The wrench next includes adjusting means to vary the bias on said spring to adjust the operating force. Said means includes a plug set in the lever rearward of the spring, an elongate screw is engaged through the plug. The front end of the screw engages the rear end of the spring.

Abstract: A torque wrench including a drive heat defining a torque transfer axis and having a shank generally coaxial within and pivotally connected to a tubular handle, and coupling means including a spherical coupling member releasably interconnecting the shank and handle so as to effect pivotal movement of the handle and create an audible indication to the operator when a predetermined but selectively variable torque is applied at the torque transfer axis in either rotational direction. A tubular auxiliary handle is adapted for telescoping relation with the primary handle and enables torque multiplication.

Abstract: The invention comprises improvements in manual preset torque wrenches that substantially improve the useful life of the wrench, the repeatable accuracy of the wrench, and substantially decrease the weight and manufacturing cost of the wrench.The improvements include a free floating camming roller that moves from dual pockets with a rolling action substantially out of the pockets at the preset torque. In one embodiment the camming roller is centered within the wrench in the unactuated position between milled slots that comprise the pockets. In an alternate embodiment the pockets and camming roller are offset from the centerline of the wrench permitting a configuration that greatly reduces friction on the inside of the tubular wrench body. The reduction in friction and abrasion in the alternate embodiment permits a lightweight aluminum tube to be substituted for the body of the wrench thus significantly reducing the weight of the wrench.

Abstract: A pneumatically powered hand-held torque wrench having a handle portion which can be forced out of axial alignment with a work engaging end of the tool by manual force applied to the handle portion of the tool, whereby an enclosed torque tube will operate through a cam arrangement to cause the inner surface of the handle portion to move with a snap action into contact with one of the cams in the cam arrangement to cause an audible signal which will indicate to the operator that a predetermined torque has been applied to the set fastener. The snap action is accompanied by a slight slipping action which is sensed by the tool operator.

Abstract: A torque wrench having a main body of fixed overall length and having a torque adjusting mechanism enclosed within the main body. The adjusting mechanism is controlled by a rotatable handle disposed about the main body. The adjusting mechanism includes a first part which is connected with the handle for joint rotation therewith, but which is constrained against axial movement. The adjusting mechanism further includes a second part having a polygonal portion extending into a polygonal recess in the first part to couple the first and second parts for joint rotation while permitting linear movement of the second part. The second part is designed to move linearly in response to joint rotation of the first and second parts in order to effect adjustment of the torque setting of the wrench. The handle contains a locking mechanism to prevent movement of the adjusting mechanism during operation of the torque wrench.

Abstract: An improved adjusting torque wrench includes an adjusting screw that is utilized for the purpose of changing the torque setting of the wrench. The screw has a radial flange thereon having a plurality of circumferentially spaced notches in the outer periphery of the flange. The adjusting screw is fixed to the grip member and rotatable therewith relative to an adjusting nut that is fixed in the lever arm of the wrench. A detent that is movable into and out of the recesses in the adjusting screw is slidably carried by the lever arm so that when engaged in the recesses, the detent prevents relative rotation between the grip member and the lever arm, and thus prevents adjustment of the torque. Also, the detent extends exteriorly of the gripping member so that it can be grasped by the operator of the wrench and moved out of the recesses so that the wrench can be easily adjusted to a new torque setting.